Siemens SINUMERIK 840D SL Operating Manual page 315

Parameter Description
For G code and ShopMill – axes XY (right angled)
X0 X coordinate of the reference point X (abs)
Y0 Y coordinate of the reference point Y (abs)
α0 Starting angle for first position.
Positive angle: Full circle is rotated counter-clockwise.
Negative angle: Full circle is rotated in clockwise direction.
α1 Advance angle - (for pitch circle pattern only)
After the first hole has been drilled, all further positions are advanced by this angle.
Positive angle: Further positions are rotated counter-clockwise.
Negative angle: Further positions are rotated clockwise.
Radius
R
Number of positions
N
Positioning motion between the positions
Positioning
Straight line
•
Next position is approached linearly in rapid traverse.
Circle
•
Next position is approached along a circular path at the feedrate defined in the
machine data.
(only for ShopMill) Axes: XA
X0 X coordinate of the reference point (abs)
A0 Start angle of the A axis (abs)
A1 Advance angle of the A axis (inc) - (for pitch circle pattern only)
N Number of positions
(only for ShopMill) Axes: YB
Y0 Y coordinate of the reference point (abs)
B0 Start angle of the B axis (abs)
B1 Advance angle of the B axis (inc) - (for pitch circle pattern only)
N Number of positions
Milling
Operating Manual, 02/2012, 6FC5398-7CP40-3BA0
Programming technological functions (cycles)
8.1 Drilling
Unit
mm
mm
Degrees
Degrees
mm
mm
Degrees
Degrees
mm
Degrees
Degrees
315